MULTIPHASE
16 VERTICAL F-PLN management
ALT CSTR [4R]
ALT CSTR at a WPT is displayed in [3R]
on VERT REV page, selected at that WPT
(revise point).
ALT CSTRs may be:
VERT REV AT TOU
EFOB=7.2 EXTRA=1.3
CLB SPD LIM UTC CSTR
250/FL100 [ ]
SPD CSTR ALT CSTR
[ ] [ ]
ACCESS
<WIND DATA STEP ALTS>
<RETURN
− AT,
− AT OR BELOW,
− AT OR ABOVE,
− WINDOW (i.e. between two altitudes).
They may be:
− Defaulted value defined in NAV data base (small font, magenta), or
− Pilot-entered (large font, magenta).
(Color changes to yellow when entered as TMPY F-PLN.)
WINDOW CSTRs can only be entered as part of procedure defined in
NAV data base.
Entry rules:
ALT CSTRs are not applicable to CRZ phase, and cannot be entered at
origin, DEST, FROM WPT, pseudo-waypoint, HOLD exit fix.
Before reaching CRZ:
− If an ALT CSTR is entered at a WPT prior to T/C (or in SID if no T/C
exists), it is a climb CSTR,
− If an ALT CSTR is entered at a WPT belonging to the cruise segment,
prompts {CLR / DES} are displayed to be chosen by pilot,
− If an ALT CSTR is entered at a WPT after T/D (or in STAR or
Approach if no T/D exists), it is a descent CSTR.
When in CRZ, DES or APPR phases, an ALT CSTR entered at any active
F-PLN WPT (except in GA procedure) is a descent CSTR.
An ALT CRST entered in a GA procedure is a climb CSTR.
A climb ALT CSTR must be above take-off THR RED ALT to be accepted
after take-off; in go-around it must be above G/A THR RED ALT.
A descent ALT CSTR must be above DEST altitude + 400 ft to be
accepted.
Manually entered ALT CSTRs must be below CRZ ALT, and also below
all inserted step ALTS for DES.
Entries rejected for above reasons trigger "ENTRY OUT OF RANGE"
s-pad msg (white).
An ALT CSTR is considered matched if ALT ERROR is less than or equal
to 250 ft; otherwise it is considered missed. It remains missed until
the ALT ERROR decreases to 200 ft.
J43126AA 00
© THALES AVIONICS S.A.
AIRBUS A318/319/320/321
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